Loom shuttle



May 4, 1965 w. w. MoGAYzEL LOOM SHUTTLE Filed Aug. 24, 1962 INVENTORWLLIAM W MOGAYZEL BY M A TTORNEY United States Patent O 3,181,572 LGOMSHUTTLE William W. Mogayzel, South Dartmouth, Mass., assigner to DraperCorporation, Hopedale, Mass., a corporation of Maine Filed Aug. 24,'1962, Ser. No. 219,312 4 Claims. (Cl. 139-207) This invention relates-to loom shuttles and, more particularly, to an improved and novel meansof assembling a shuttle'spring cover in the bobbin recess thereof.

It is a general object of the invention to provide a shuttle springcover retaining means that will maintain its assembled position in ashuttle.

It is a further object of the invention to provide a pair of springcover retaining members which shall serve to eliminate the old andwell-known undesirable condition of conventional cover screws workingloose and then failing, and also to eliminate shearing of the screw dueto repetitive transfers.

'It is more specific object of the invention to provide a pair ofyspring cover retaining members which serve more securely -to support thecover member in operating position and by means of the extended threadedportions of said members, substantial contact area is had between saidthreaded portions providing improved holding properties for maintainingthese members in their initial position.

- Further objects of the invention will become apparent from thefollowing more detailed disclosure.

Shuttles utilized in looms of the automatic bobbinchanging type areprovided with a spring bobbin holder and a spring cover fixedlypositioned in a recess at one end of the shuttle and the spring memberis provided with internally grooved spring biased jaws which are adaptedto receive and hold a filling bobbin in a manner well known to thosefamiliar with the art. The spring cover is adapted to assemble over thelooped portion of the spring member and serves as a guide during thereplenishment cycle to direct the rings provided on the butt of a bobbinto their respective grooves in the jaws of said spring member.

The assembly and function of the foregoing parts being well known tothose conversant in the art, it is considered satisfactory at this pointto call attention to the following patents which depict and disclose theconventional means of assembling shuttle spring covers. Reference ishereby made to the information disclosed in patents numbered 2,640,507and 2,778,381.

This method of assembling the shuttle spring cover has been utilized formany years and with the introduction of the improved models of looms andthe increased speeds with which they were designed to function createdan undesirable and detrimental condition of the shuttle spring coverscrew working loose after a short period in operation and/or becomingsheared due to oscillations imparted in the transfer operation. Theseconditions are attributed to the accelerated speeds to which shuttleswere subjected as Well as the increased number of bobbin transfers.

A slight looseness of a cover screw sets up a slight oscillatingmovement of the screw at each pick and at transfer when the bobbin buttstrikes the guide portion of the spring cover, which initiates fatiguefailure of the screw resulting in breakage at the threaded portionthereof. Additionally, a cover screw will often loosen progressivelytill the head portion has worked upwardly a sufficient distance to causea smash, or, in other words, the head of the screw will contact and tearout a series of warp threads.

Until the present invention, this condition has been 3,1815@ PatentedMay 4, 1965 considered quite serious and excessive time has beenrequired to check these screws constantly for proper tightness.According to the instant invention the above disadvantages are overcomethrough use of applicants novel spring cover retaining members.

A preferred form of the invention comprises the combination of aninternally threaded thrust bushing and locking screw. The thrust bushingincludes a base portion which is adapted to seat in a preformed matingaperture that is provided on the underside of the body portion of theshuttle, and is shaped in such a manner as to resist turning therein. Anintegrally formed cylindrical barrel portion of a diameter somewhatsmaller than the outer dimensions of the base portion, extends upwardlyfrom the latter first through an aligned aperture in the lower part ofthe cover member, thence between the looped portion of the springitself. This barrel portion extends upwardly a distance sufficient toplace the upper end thereof in close proximity with the underside of theupper portion of the cover. The upper end of the bushing is providedwith an integrally formed cylindrical extension of a smaller diameterthan the barrel portion which is adapted to enter an aligned apertureprovided in the top of the cover. A locking screw assembles in thecylindrical extension and barrel portion and when tightened, it drawsthe upper part of the cover into contact with the bushing which providesthrough extended area contact of the threaded members, a firm andpositive means of shuttle spring cover assembly.

The invention will be described in greater detail by reference to theadditional embodiments thereof as illustrated in the accompanyingfigures of drawing, wherein:

FIG. 1 is a plan view of portion of a shuttle according to the inventionshowing the top of the locking screw utilized to maintain the springcover in its proper operating position with respect to the spring bobbinholder;

FIG. 2 is a view in side elevation and partially in section showing thepreferred embodiment of the invention as heretofore described; and

FIGS. 3 and 4 are views similar to that of FIG. 2 but showing a firstand second modification of the retaining members that may be utilized.

Now referring to the figures of drawing, FIG. 1 shows one end only of ashuttle 1G having a bobbin recess 11 which at that end illustrated, isprovided with a spring bobbin holder 12 and a generally U-shaped springcover 13. In a manner well known to those familiar with the art, thespring bobbin holder 12 is adapted to receive a filling bobbin such asthat depicted by numeral 14 having a butt portion 15 on which aplurality of holding rings 16 of the conventional type are mounted. FIG.2, being the preferred form of the invention, shows the same in sideelevation with part of the shuttle and its components in section.

The invention comprises a pair of retaining members indicated generallyby numerals 17 and 18. Numeral 18 indicates an internally threadedtubular thrust bushing and numeral 17 indicates the locking screw whichis adapted to assemble therein. The thrust bushing 18 is provided with abase portion 19 which is adapted to fixedly seat in a preformed matingaperture 20 provided on the underside of the shuttle 10. An integrallyformed cylindrical barrel portion 21 having a diameter somewhat smallerthan the outside dimensions of the base portion, extends upwardly fromthe latter, first through an aligned aperture in the lower portion ofthe spring cover 13, thence between the looped portion of the springbobbin holder 12. This cylindrical barrel portion extends upwardly to apoint which places the upper part thereof in close proximity with `theunderside of the upper part of the spring cover 13. The upper part ofice this barrel portion is provided a stepped cylindrical, Y andintegrally formed portion 22of a smaller diameter l which isyadapted Vtoenter partiallyyan alignedVV apertureV provided inthe top of the springycover 13.` The assembly and tightening Vof the Ylocking screw V17 inthe threaded portion of the thrust bushing 18 drawthe upper portion ofthe spring coverf13 into contact with-the ytop'of the" Y barrel portion21 to provide a `firm and positive means-y of maintaining theretainingmembers -17 andjj18 in their.;

initial position through substantial threaded V.':ireafc'ontact of thesemembers. Y

Av modification of the Yinvention is shown inFIG. i31"."

which also includes a thrust bushing indicated generally fr by numeralv23 and a'locking-screw 24. f f

As with the .preferred former thrust bushing, this screw, said thrustbushing 2. Foruse inV a including a baseportio'n with a` cylindricalybarrel'portionfextending therefrom, said barrel portion beingprovidedat its free endfwith a stepped cylindrical and j integrally forme'dportion lof a ysmaller diameter whichV is adapted V.tovseat in anValigned'aperture provided .in the top. portion" of 'lsaidlspririgcover, said cover-,screw beingVY adapted to assemble 'in saidcylindricalY t. barrel `portionV providing yextended Contactlarea-between Y Y' the "threaded rnernbersxass'urin'gY positiveand firmasse1:n bly Ybetween' the same and said'sprin'gbobbin Vholder andspring'cover. Y' A Y o Y I n K loom' shuttlejhaving abody portion withaV centrally located-:bobbin compartment anda spring YV'bobbin holderand spring cover having interconnected modification yincludes a'baseportion 25,V that is adapted Vto seat in the preformed aperturefZU oftheshuttleV and is provided Jwith an integrally formed cylindrical barrelportion 26' extending from said base portion.

spring cover 13'and the vlooped portionof the/spring bobbinv holder `12but terminates at apoint A,which places the top of said barrelportion-in'close proximity k(with:

Y Thisbart- Y rel portion 26 -passes through the lower portion ofthe topand lower portions which are adapted to extend from t one'end'offandintov said compartment, a retaining means VVfforf.fiiiedlyi'positioningsaid,spring cover in said'compartment and incontact with said bobbinholder which comprisesvthe combination of a'thrust bushing internallythreadedfor substantiallvits entirelength and a.cover screw, Vsaidthrustbushing including a base portion with cylindrical barrel( portionextending; therefrom, said 47V'barrelportion .being provided at itsfreegend with a the undersideof the'upper portion of the spring cover 13Y and in alignment with a countersunk hole providedv in the latter.HThis thrust bushing is internally threaded` for its entire length,andthe assemblyand tightening of'V screw 24 therein draw the upperportion of cover 13 into. f

contact with the top of the barrel portion `26 forming a rm and positiveYmeans of assembly as with the preferred form ofthe invention.

Now referring to FIG.- 4,' a second modication of the y Y, invention isdevoted toward what is more or less a reversal of the practice disclosedwithrespect to FIGS. 2 and 3,

in that, the locking screw` 27 ris provided with Van inte.

grally formed base portion'28 which is adapted to seat Y l in thepreformed openingv 2t). The screw portion 27ex- Y tends upwardly in thesame manner as the barrel-por# tion 21 of the preferred form and isadapted to receivev thereon an internally threaded cylindrical.. thrustbushing:

29. This'thrust bushing is provided with an upper tapered and slottedhead portion 30 whichV when assembled ony screw 27 is caused to seat inan aligned countersunk hole providedin the upper part fof the springcover 13. The cylindrical part of thisV bushing then .passes throughtheA` looped portion of the spring bobbin holder`12 and thence throughan aligned aperture in the lowerV portion of sa1d spring lcover 13. A swith the iirs't modification and preferred formof the invention,tightening of thesefre-n' taining members also provides a rm andpositive meansf of maintaining said Vretaining members Vin theirVinitlal positions by providngr 'extended lhlfeled alega Gontact betweenthem,A .Y Y v These thrust bushings and,Y lockingfscrews underref: vpeated tests and Vactualloom-running Vconditions haveV demonstrated thatapplicants novel means of spring cover, assembly has corrected'tlle longstanding undesirable.

condition of shuttle cover screws looseningand shearing.

While one embodiment and modifications of the invention haveV beendisclosed, it is to be understood that the ways.y This invention is',therefore, Vnot to be limited to,-y

the precise details described, but is intended' to embrace allvariations and modications thereof falling Within the spiritofthevinvention andthe scope of the claims;

I claimt,A 'Y ,Y Y t Y A l. In a gloom/shuttle having abodyportionlwithja centrally located ,bobbincompartment and a springbob,-

"steppedcylindricaland integrally formed portion of a smaller;V diameteradapted to seat in ain-aligned aperture provided* inthe top lportion ofVsaid spring cover, said cover screw being adapted to assemblein'saidcylindrical barrel portion providing substantial `contact'areabetween the threaded'members assuring positive" and iirmassembly'between,thej -same and said spring bobbin holder and springcover.v f v 3. In a. loomshuttle having abody portion witha centrallylocated bobbin compartment and Ya spring Vbobbin holder and a generallyU-'shaped spring cover havingV interconnected top and lower portionspositioned atl one end of said compartment Vand'fin'clarnpingrelationship f Y with said bobbin holder, Ya retaining 'means forfixedly positioning said spring kcover-finy said compartment and .incontact with said bobbin holder which comprises the combination of athrust bushing internally threaded for substantially its entire lengthand atthreaded .coverrscrew, one of said' combination of thrust-bushingand Vcover vscrew extending through the upper-.portion ofk said springcover and the otherV of said 'combination' extending Y through the lowerportionV of said cover as well asrthrough` a portionrof the shuttlebodyandbeing non-rotatable therewith saidthrust Vbushing including a base)portion V6() inventive concept may be Vcarried out ini a number of witha cylindrical :barrel portion extending therefrom,

said barrel portionI terminating immediately adjacent the Vunderside'ofsaid upperportion, said cover screwhaving` substantiallyv theentirethreaded Aportion .thereofL received into saidbarrelrportion so thatmovement orf said'rupper portion of said spring cover is ,restrictedbetween-a head portion of the cover screw andthe terminal portionAV ofthejbarrel Vwhereby said cover screwY is substantially "strengthenedtoeliminate shearing thereof due to repeti-` Jtive bobbin transfers andthere is provided extended contactv `area Vbetween said coverV screw andthrust bushing` in Vord'er'to assure positive and firm assembly of saidbobbin holder and'cover.`

v.5r-4.71m4 a l.loom shuttlewliaving afbody portion :with a Ycentrallylocated'bobbinV -compartmen't'and a spring-:bobbin holderfan'd aVgenerally 'Ueshaped spring cover having bin 'holder and springcoverhaving interconnected top and `lower portionsV which are adaptedYto.,errtendlrrornf one end of andinto :said compartment,r aretainingimeans forlxedly positioning said spring cover inVsaidcom'partmentand in4 contact with said bobbin holderv whichcomprises the Vcombination of VaV thrustV bushing. Vinternallythreadedfor substantially its entire Vlerigthand a coverinterconnectedjtop. andV lower. portions positioned at one Y' endof;said `compartrnentga retaining meansY for `xedlyl Y positioningqsaid;spiin g .cover inj'said compartment and 4in' contac witl 1'said-bobbinholderwhich comprises fthe f y Vcombinatin vof aj thrust bushing.internallyY threadedfrfor substantiallyts entire/length and a. threadedvcover screw, said thrust'bushing.includinga Vbase portion with acylindrical VVbarrel portion'lextending therefrom, fsaid barrel portionextendinglthrough 'a.portionlof thev shuttle .body `through saidplower'portion of the springzcover and terminating Vagainst theunderside ofsaid u'pper` portion,

"saidotcover screw extending through theupper portion of the springcover and having substantially the entire threaded portion thereofreceived into said barrel portion to provide extended contact areatherebetween in order to assure positive and firm assembly of saidbobbin holder and cover so that movement of said upper portion of saidspring cover is restricted between a head portion of the cover screw andthe terminal portion of the barrel.

References Cited by the Examiner UNITED STATES PATENTS 8/16 Stewart 85-18/ 32 Schjolin 85-4 6/34 Reiter 85-4 3/40 Reid 139-207 4/57 Bousquet139-207 11/ 61 Grunke 139-207 FOREIGN PATENTS 7/27 Italy.

MERVIN STEIN, Primary Examiner.

RUSSEL] C. MADER, DONALD W. PARKER,

Examiners.

3. IN A LOOM SHUTTLE HAVING A BODY PORTION WITH A CENTRALLY LOCATEDBOBBIN COMPARTMENT AND A SPRING BOBBIN HOLDER AND A GENERALLY U-SHAPEDSPRING COVER HAVING INTERCONNECTED TOP AND LOWER PORTIONS POSITIONED ATONE END OF SAID COMPARTMENT AND IN CLAMPING RELATIONSHIP WITH SAIDBOBBIN HOLDER, A RETAINING MEANS FOR FIXEDLY POSITIONING SAID SPRINGCOVER IN SAID COMPARTMENT AND IN CONTACT WITH SAID BOBBIN HOLDER WHICHCOMPRISES THE COMBINATION OF A THRUST BUSHING INTERNALLY THREADED FORSUBSTANTIALLY ITS ENTIRE LENGTH AND A THREADED COVER SCREW, ONE OF SAIDCOMBINATION OF THRUST BUSHING AND COVER SCREW EXTENDING THROUGH THEUPPER PORTION OF SAID SPRING COVER AND THE OTHER OF SAID COMBINATIONEXTENDING THROUGH THE LOWER PORTION OF SAID COVER AS WELL AS THROUGH APORTION OF THE SHUTTLE BODY AND BEING NON-ROTATABLE THEREWITH SAIDTHRUST BUSHING INCLUDING A BASE PORTION WITH A CYLINDRICAL BARRELPORTION EXTENDING THEREFROM, SAID BARREL PORTION TERMINATING IMMEDIATELYADJACENT THE UNDERSIDE OF SAID UPPER PORTION, SAID COVER SCREW HAVINGSUBSTANTIALLY THE ENTIRE THREADED PORTION THEREOF RECEIVED INTO SAIDBARREL PORTION SO THAT MOVEMENT OF SAID UPPER PORTION OF SAID SPRINGCOVER IS RESTRICTED BETWEEN A HEAD PORTION OF THE COVER SCREW AND THETERMINAL PORTION OF THE BARREL WHEREBY SAID COVER SCREW IS SUBSTANTIALLYSTRENGTHENED TO ELIMINATE SHEARING THEREOF DUE TO REPETITIVE BOBBINTRANSFERS AND THERE IS PROVIDED EXTENDED CONTACT AREA BETWEEN SAID COVERSCREW AND THRUST BUSHING IN ORDER TO ASSURE POSITIVE AND FIRM ASSEMBLYOF SAID BOBBIN HOLDER AND COVER.